/*
 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

// Pine changed: Move package to top.canyie.pine.xposed
package top.canyie.pine.xposed;

import java.util.Enumeration;
import java.util.NoSuchElementException;

/*
 * A useful utility class that will enumerate over an array of
 * enumerations.
 */
public class CompoundEnumeration<E> implements Enumeration<E> {
  private Enumeration<E>[] enums;
  private int index = 0;

  public CompoundEnumeration(Enumeration<E>[] enums) {
    this.enums = enums;
  }

  private boolean next() {
    while (index < enums.length) {
      if (enums[index] != null && enums[index].hasMoreElements()) {
        return true;
      }
      index++;
    }
    return false;
  }

  public boolean hasMoreElements() {
    return next();
  }

  public E nextElement() {
    if (!next()) {
      throw new NoSuchElementException();
    }
    return enums[index].nextElement();
  }
}
